The Doppler effect can be used to: A) measure the distance to a star using the star's parallax B) determine what a star is made of. C) measure the temperature of a star. D) measure the radial velocity of a star

Q: Why don’t all supernova remnants contain pulsars?   a. All supernova remnants do contain pulsars.…

A: As we know that pulsar are fast spinning neutron stars. When there is a explosion in a star at the…

Q: Absolute visual magnitude is   a. the apparent magnitude of a star observed from Earth.   b. the…

A:

Q: 13) Calculate the luminosity in watts from the absolute magnitude for the given stars: (a) Sun (M =…

A: Luminosity can be defined as an absolute measure of radiated power emitted by a light source over…

Q: 06

A: Given that:-Luminosity, L=78.4×1026 Watt.Radius, r= 1.2×106 kmr= 1.2×106×103m=1.2×109 mWe know…

Q: 4. Alpha Siruis is 3.9 x 1015 miles away from the Earth. Calc the parallax at which the star is…

A: The distance between Alpha Sirius and Earth is given as, d=3.9×1015 miles. TO DETERMINE: The…

Q: If an object formed from a cloud of dust and gas is less than 0.08 solar mass, it forms a   a.…

A: If an object formed from a cloud of dust and gas is less than 0.08 solar mass, it forms a brown…

Q: As a white dwarf cools, its radius will not change because   a. pressure resulting from nuclear…

A: White dwarf is one of forms of a star in its life span. Whenever a star exhaust of its fuel, it…

Q: Which spectral line does this likely correspond to?

A: we can use the doppler shift formula to find laboratory wavelength.

Q: Stars which appear single to the naked eye but are double when seen through a telescope are: A.…

A: Stars which appear single to the naked eye but are double when seen through a telescope are called…

Q: Two stars are in a closely orbiting binary system. The smaller star (a K-type main sequence star)…

A: The correct option. Following the mass transfer, which of the following is now true of the main…

Q: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a   a.…

A: If a stellar remnant is in between 0.4 and 1.4 solar masses, the resulting object will be a white…

Q: A star is observed with a surface temperature of 3,000 K and a luminosity of 100,000 solar…

A: Given , Temperature = 3000 K Solar Luminosity = 100,000  Now , mass and luminosity are related by…

Q: Hertzsprung-Russell Diagram Bhe or bhue white White Vellow Red orange Red ORigel Superglants…

A:

Q: What is the distance in light years from Earth to a star that makes a parallax angle of 2.0 arc…

A: Given  parallex(p)=2 arc second

Q: The period–luminosity relation is useful in determining   a. the mass of a star for which the…

A: Period-luminosity relation :-                                                   According to this…

Q: The Messier Catalog is a. a listing of all the stars within the Local Bubble b. a list of all the…

A: The Messier catalog is a list of 110 commonly found objects in the night sky that can be easily…

Q: 13) Calculate the luminosity in watts from the absolute magnitude for the given stars: (a) Vega (M =…

A: The energy radiated per unit of time by an astronomical object is called luminosity.   The…

Q: The gas and dust cocoon surrounding young stars   a. is blown away when the young stellar surface…

A: In the initial stage of star formation i.e protostar phase the young star is surrounded by dust and…

Q: The chemical abundance of population I stars   a. indicates that they were formed before the…

A: Population I star consist of sun and tend to be hot, young, luminous and focused in the spiral…

Q: A helium flash a. Is sudden and powerful. b. destroys the star. c. is a slow expulsion of helium…

A: A helium flash is a rapid explosive burning of helium gas in the deep core of low mass stars and the…

Q: s rotational period?

A:

Q: 3. A binary star system has magnitude - 1, when both stars are observed together. One of the stars…

A:

Q: A light of wavelength 620 nm is emitted from the following four places. What wavelength is observed…

A: As per general relativity, electromagnetic waves or photons that are traveling away from a…

Q: 2. 60 million years ago, an asteroid hit the Earth and killed every T-Rex on Earth. That same day, a…

A: To estimate the mass of the star that left the main sequence 45 years ago, let's break down the…

Q: ow is Doppler shift used in detecting extra solar planets? * A. Scientists observe those stars…

A: In our solar system, all bodies orbit a common center of mass, including the Sun, but the Sun is so…

Q: Which of these is NOT used as a spiral tracer?   a. O stars   b. B stars   c. young open clusters…

A: Spiral tracers are objects that are commonly found in spiral arms and soare used to trace spiral…

Q: Once carbon builds up in the Sun's core, astronomers expect our Sun to first become a red giant,…

A: Our sun is an average mass star in the main sequence. The life cycle of average main sequence star…

Q: A neutron star is the remnant left after certain supernovae texplosions of giant stars) Typically,…

A: The density is given by  ρ=Massvolume The volume of sphere is 43πR3 It is given that the mass of…

Q: Objects in binary systems consist of a neutron star accumulating material from another star on its…

A: Answer:b) X-ray bursters.  X-ray bursters are basically are one class of X-ray binary stars…

Q: Which of the following stars are bright and very cool

A: The Supergiants are cool stars, which are very large and really bright. they're located towards the…

Q: A force on a particle is conservative if: "its work depends on the end points of the motion, not…

A: A conservative force means when the work done by that force on an object is independent of the…

Q: Which type of star would be the largest? a. M b. O c. B d. K e. A

A:

Q: like a black body with temperature 5800 K.  Use the Stefan-Boltzmann Law to calculate the Sun's…

A: Given: Sun's Radius (R) = 6.96 x 1010 cm  Stefan-Boltzmann Constant  (σ)=5.67 x 10-5 ergs/cm2 K4 s…

Q: The luminosity class of a star tells an astronomer: O how long ago the star formed O whether the…

A:

Q: Distances to the nearest stars (up to 500 ly away) can be measured by a technique called parallax,…

A: The distance between the Sun and the Star is given as, dS = 4 light year (or) dS = 3.784×1013 km TO…

Q: Two stars are in a binary system. One is known to have a mass of 0.700 solar masses. If the system…

A: We know that-1 Solar mass=1.988×1030 kgMass of star 1, m1= 0.7×1.938×1030= 1.3916×1030 kgMass of…

Q: If a star has a surface temperature of 9500K. What would be the frequency of the light given off at…

A: The problem can be solved using the Wien's displacement law. This  states that the black body…

Q: 1:Which star has been redshifted the most? 2:Which star is moving towards us the fastest? Star C…

A: Redshift star: The star is said to be redshifted when it shows the displacement of its spectral…

Q: Calculate the size of a star if its surface temperature is 6000 K and has a power output of 5.6 x…

A: An ideal body capable of absorbing all the radiation that falls on it is considered a blackbody. The…

Stellar evolution

We may see thousands of stars in the dark sky. Our universe consists of billions of stars. Stars may appear tiny to us but they are huge balls of gasses. Sun is a star of average size. Some stars are even a thousand times larger than the sun. The stars do not exist forever they have a certain lifetime. The life span of the sun is about 10 billion years. The star undergoes various changes during its lifetime, this process is called stellar evolution. The structure of the sun-like star is shown below.

Red Shift

It is an astronomical phenomenon. In this phenomenon, increase in wavelength with corresponding decrease in photon energy and frequency of radiation of light. It is the displacement of spectrum of any kind of astronomical object to the longer wavelengths (red) side.